Cisco ASA Audit Event: 109039

Cisco ASA Events

The logs of network perimeter devices such as firewalls, antivirus applications and intrusion prevention systems contain crucial information that helps to pre-emptively block security attacks and breaches. Hence, it's mandatory for you to monitor and audit these logs. Because Cisco ASA provides the combined functionality of all the three, it becomes all the more important to monitor its logs. 

ManageEngine's EventLog Analyzer, a comprehensive log management solution, collects and analyzes the log data from Cisco ASA devices, triggers alerts and generate reports on detected security incidents thus helping you to take suitable measures against security threats, if any. 

Cisco » 109039: Dropping an unsupported IPv6/IP46/IP64 packet

109039: Dropping an unsupported IPv6/IP46/IP64 packet

Cisco ASA is a security device that provides the combined capabilities of a firewall, an antivirus, and an intrusion prevention system. It also facilitates virtual private network (VPN) connections. It helps to detect threats and stop attacks before they spread through the network.

Message: %ASA-5-109039: AAA Authentication:Dropping an unsupported IPv6/IP46/IP64 packet from lifc :laddr to fifc :faddr

Event 109039 is generated when a packet containing IPv6 addresses had been dropped. It might have contained IPv6 addresses or IPv4 addresses translated to IPv6 addresses by NAT, requiring AAA authentication or authorization. AAA authentication and authorization do not support IPv6 addresses.

How could you resolve this situation?

This event does not require any action.

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